/**
 * @author oldliu
 * @since 1.0
 */
public class Fnjie {
    public static void main(String[] args) {
        int k=49;
        int i=2;
        while(k!=1){
            if(k%i==0){
                System.out.print(i);
                k/=i;
                if(k!=1){
                    System.out.print("*");
                }
                continue;
            }
            i++;
        }
    }
}
